Tobacco-pipe.



No. 673,240. Patented Apr. 30, ism.

A. cAMPELL.v

TOBACCO PIPE.

(Application med Mm. 5, 1901.) (Nu Model.)

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NITED STATES PATENT Ormea,

ALBERT CAMPBELL, OF IRONTON, OHIO.

TOBACCO-PIPE.

SPECIFICATION forming part of Letters Patent No. 673,240, dated April 30, 1901.

Application filed March 5 1901. Serial. No. 49,920. LNo motlelJl tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had t0 the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention relates to tobacco-pipes, and has for its object a construction allowing a through-passage in the stem of the pipe for the insertion of a cleaning wire or brush when desired, and so forming this passage as to enable the nicotine, as well as any such accumulated in the stem or bowl, to be blown therefrom while the pipo is lighted. The nicotine being gummy when cold and liquid when hot this structure aords the simple means for cleaning the pipe without removing the charge.

Referring to the drawings, in which like parts are similarly designated, Figure is a vertical sectional view of one form of pipe. Fig. 2 is a similar view showing a removable bowl.

The interior of the bowl a connects with the passage d in the stem b by passage c, preferably,though not necessarily,perpendicular. The stem may be formed in one piece with the bowl and located below it, and contains the draft-tube d, which terminates at its j uncture with the passage c, and from this point is enlarged into a chamber e, closed at its end by a suitable closure, as a plug f. This enlarged chamber e may be square or circular or any other suitable form, but it should be so formed as to extend only from the connection c between the bowl and stem to the outer end of the latter. This construction is preferably, though not necessarily, arranged so that it will form a straight lower wall from end to end in the stem of the pipe, while the upper wall will be stepped to form a shoulder g. One side of this shoulder forms a wall or continuation of the passage c between the tube d and the interior of the bowl a.

In order to clean the pipe, it will suffice to remove the screw or other plug f from the enlarged chamber eat the outer end of the stem. On blowing through the stem the air will pass through the passage d and expand into the chamber c, but in so doing it will not immediately expand and follow the vertical wall of the passage c on the line of the shoulder, but due to its inertia will reach full expansion beyond this passage c and entrain with it any liquid nicotine contained in the lower part of the bowl of the pipe, as well as force out any accumulation in the tube d of the stem. A partial vacuum is produced immediately under the passage c and causes the nicotine, which is ,kept fluid by the heat of the lighted charge in the pipe, to be drawn down from the bowl and expelled.

The straight wall of the lower part of the stem gives a smooth through-passage for a brush or wire for a more complete cleaning, if desired. In Fig. 2 I haveshown a similar construction, the bowl being removable from the stem.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

l. In a tobacco-pipe, a stem having a drafttube terminating in an enlarged chamber, anda connection between the bowl and stem at the junction of said draft-tube'and chamber, forming part of the continuation of a straight wall of said chamber, substantially as described.

2. In a tobacco-pipe, the combination with the bowl, the stem, a chamber formed in the end of the latter and a draft-tube in said stern, of a connection between the bowl and draft-tube arranged so as to form a partial vacuum in said connection when blowing air through said tube, substantially as described.

3. In a tobacco-pipe, the combination with the bowl, of a stem havingastraight passage from end to end therein, the lower wall of said passage being continuous, the upper wall discontinuous and a connection between the bowl and stem at the discontinuous portion, substantially as described.

Il. In a tobacco-pipe, the combination with the bowl, of a stem formed in one piece therewith, a through-passage from end to end in IOO said stem, the outer1 end of said passage eu-A I my invention I have signed my name in preslarged, a vertical connection between the ence of two subscribing-Witnesses. bowl and stem at the junction of saidpasr sage and its enlargement and a' closure for ALBERF CAMPBELL' the outer end of said enlargement, substantially as described.

1n testimony that I 'claim the foregoing as Witnesses:

GEO. E. FRECH, HENRY ORTH, Jr. 

